Semi-automatic gun with fluid-accumulator.



F. LENDER.

SEMI-AUTOMATIC GUN WITH FLUID AGGUMULATOR.

APPLICATION FILED NOV. 18, 1911.

1,091,360. Patented Mar.24,1 91L 2 SHEETS-SHEET 1.

WWI/01111111111411 COLUMBIA PLANOGIAFH COQWASHINIION. 12-6- P. LENDER.

SEMI-AUTOMATIC GUN WITH FLUID AOGUMULATOR.

APPLICATION FILED NOV. 18, 1911 1,091,360. V Patented Mar.24,1914L 2 SHEETS-SHEET 2.

COLUMBIA PLANOGRAPH COqWASHlNGTON. D. c.

FRANZ LENDER, or s1. rETERsBUrte, Russia.

SEMI-AUTOMATIC GUN WITH FLUID-ACCUMULATOR.

Specification of Letters Patent.

Patented. Mar. 24, 1914;.

Application filed November 18, 1911. Serial No. 661,167.

To all whom it may concern:

Be it known that I, FRANZ LENDER, a subject of the Russian Emperor, and resident of St. Petersburg, Russia, have invented certain new and useful Improvements in Semi- Automatic Guns with F luid-Accumulators, of which the following is a specification.

This invention relates to a device for automatically opening and closing a screw breech mechanism which device forms a modification of the device for automatically actuating the breech mechanism described in a joint application Serial No. 661168 made by applicant.

In the accompanying drawings: Figures 1 to 8 show longitudinal sections of the main part of the device; Fig. 4 shows aside elevation view; Fig. 5 is a cross section and Fig. 6 a plan of the actuating mechanisminterposed between the piston rod of the accumulator and the shaft of the breech mechanism.

The device comprises a heavy body a which has received the shape of a driving piston and is adapt-ed to slide freely in the central cylindrical part of the casing 0. The latter casing is secured to the gun barrel and is provided on each side of the cylinder containing the driving piston a with a chamber, the lower part of which contains a liquid which has very slight elasticity as regards compression, such as water, while the upper part of it contains an elastic fluid, such as any suitable gas. The working cylinder 0 is arranged at the lower part of the casing. Contained in the right hand chamber is the compressed elastic substance 6 of the accumulator, while the left hand chamber contains the elastic substance cl in which energy for closing the breech mechanism is stored up. The working cylinder 0 contains the piston e which through the medium of thepiston rod 6', transmits the energy of the accumulator to the shaft of the breech mechanism.

Fig. 1 shows the breech mechanism in a closed state and the device ready for firing. During the firing of the shot the driving piston it moves in the casing 0 a certain distance toward the right (from the position shown in Fig. 1 into the position shown by Fig. 2) thereby forcing the liquid from under the driving piston through the valve f into the accumulator chamber thereby storing energy produced by the recoil. The advantage of this inertia accumulator has been described in the specification of the invention for which a joint application has been filed. The valve f. which allows the free passage of the liquid from the central part lnto the right chamber, closes at the end of the motion of the driving piston under the action of the force of the valve spring f",

and under the pressure of the accumulator which is thus loaded (Fig. 2). The accumulator work is made available for producing the motions of the breech mechanism by the cock 9 which either connects the right hand side of the working cylinder 0 with the accumulator or with the space under the driving piston or entirely separates the said spaces from each other. The left hand chamber of the casing is in a constant con- .nection with the left hand side of the cylinder 0 through the medium of the passage It. When the gun barrel after the recoil motion returns into the position of firing and when it is desired to open the breech mechanism,

the cock 9 is rotated toward the right hand side and is thus brought into the position I Fig. 1. Thereby the right hand side of the cylinder 0 is connected with the accumulator space and the piston 6 under the pressure of the. elastic substance 6 starts moving toward the left hand side. With the piston rod e, moves the toothed rack i which meshes with the toothed wheel j and thus rotates the hollow shaft is. The disengageable coupling Z allows of this hollow shaft being connected with the inner shaft m which latter drives the breech mechanism the elastic substance cl contained in the latter thus storing up work for closing the breech mechanism. When it is desired to close the breech mechanism by means of the accumulator which has also produced the opening of the breech mechanism, the cock 9 is moved fromthe position I into the position II. The piston e is then moved toward the right under the action of the tension of the elastic substance (Z; the breech mechanism is closed and the liquid contained in the right hand part of the working cylinder 0 is forced through the open cock 9 into the central cylindrical part of the casing. Now, if after the closing of the breech mechanism, the cock 9 is brought into its central position, all parts of the device are brought back into their original position (Fig. 1). The cock 9 which is actuated by means of the lever r, the rod 8 and the crank 27, is held in its middle position by a lock bolt 11 so as to be unable to leave its position during the firing of the shot. I

It follows from the foregoing specification that the device is entirely separated from those parts of the gun which remain stationary during the firing of the shot; it is consequently impossible that irregularities in the back and forward motion of the barrel have an influence on the function of the de vice.

Having now fully described my said invention, what I claim and desire to secure by Letters Patent, is:

1. In a recoil gun of the character described, the combination with the gun barrel and the screw breech mechanism, of an accumulator comprising a cylindrical casing divided into a plurality of chambers, a driving piston adapted to freely move in one of said chambers, a liquid within each of the chambers, an elastic fluid in one of the chambers in addition to the liquid therein, a valve interposed between the chamber containing the piston and the chamber containing the elastic fluid and controlling the communication between the said two chambers, and means for using the force stored up in the compressed fluid by the movement of the piston for opening the said breech mechanism.

2. In a recoil gun of the character described, the combination with the gun barrel and the screw breech mechanism, of a cylindrical casing connected with said barrel and divided into three chambers, a driving pisthe end chambers to the said breech mechanism for opening it, means for compressing the fluld 1n the other end chamber when the breech mechanlsm 1s opened, and means for transmitting the energy stored up in the fluid in the last mentioned end chamber to the breech mechanism to close the latter.

3. In a recoil gun of the character described, the combination with the gun barrel and the breech mechanism, of a cylindrical casin divided into three chambers, a driving piston adapted to freely move in the central chamber, a valve interposed between the central chamber and one of the end chambers and controlling the communication between the two, a liquid in each chamber, an elastic fluid in the end chambers in addition to the liquid therein, a cylinder carried by the casing, a second piston working in said cylinder, the interior of said cylinder at one side of its piston and one of the end chambers being in communication by a port, a valve controlling the communication between the other end chamber and central chamber with the interior of the cylinder at the other side of its piston, as set forth, and means intermediate the said second piston and the breech mechanism for opening and closing the latter under the force exerted by the compressed fluid in the end chambers.

In testimony whereof I have hereunto set my hand in presence of two witnesses.

v FRANZ LENDER.

Witnesses H. A. LOVIAGUINE, AUG. MIGHIS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatentn.

Washington, D. G. 

